remove warnings about @variable_for_layout

don't encode an UTF-8 encoded template

This reverts commit ce0cf7d6.

  from Ruby stdlib.

Fix database tasks in test namespace.

This is mostly the same as 876bade5
that was reverted due to test failures, but now with a correction.

This reverts commit a0edfb4d, reversing
changes made to 4012fcff.

Fix database tasks in test namespace.

Make structure.sql file configureable in db:structure:dump analog to SCHEMA in db:schema:dump

bypass preloading for ids_reader

call scope within unscoped to prevent duplication of where values

Warning removed in test

when fetching ids for a collection, bypass preloading
to avoid the unnecessary performance overhead

No need 'abstract_unit' here. It's already in 'generators_test_helper'

Rake tasks generator

Add Help Text to Routing Error

When a newcomer hits the routing error page they
are often confused about how to trouble shoot the
next step. Adding a simple help text can gently 
remind coders where to get more help.

Allow symbols to be passed as extension aliases in Mime::Type.register